Improvement in shaft-hangers



T. R. PICKERINGV SHAFT-HANGERS. v

No.185.,188. -Patented De.c.12,1876.

UNITED Grrroa.

IMPROVEMENT IN SHAFT-HANGERS.

Specification forming part of Letters Patent No. 185,188, dated December 12, 1876; application tiled April 13, 1875.

To all whom it may concern:

Be it known that I, THOMAS E. PICKERING, of the town of Portland, in the county of Middlesex and State of Connecticut, have invented certain Improvements in Shaft- Hangers, of which the following is a specilication As heretofore constructed shaft hangers or brackets have always been made in two or more parts, such parts being tted and bolted or otherwise contined together.

My invention is designed to avoid the labor and expense involved in such complexity. I construct a spherical seltadjusting box, making this part in one piece or more pieces, as may be most convenient, and encirclingit within a bracket or hanger cast in one piece around the other. The bracket may consey quently be made lighter, stronger, and cheaper than has heretofore been known.

I cast the box and hanger fitting closely each to the other-that is to say, I first cast and properly prepare one, and then cast the other one thereto, thus avoiding much labor and expense.

In the accompanying' drawing, Figure l is a longitudinal section illustrative of my invention, and Fig. 2 is a nearly corresponding cross-section.

In constructing the self-adjusting box and hanger or bracket I rst cast the box A A vwith its central part A spherical, and with projection or pin C. The interior of this box is then iitted to its shaft m, either by boring or by being properly prepared for the reception of anti-friction metal, the object being to allow the sha-ft to extend through the box and turn freely therein. This box is equipped with a core to forni the groove D, and is then placed in a' mold adapted to produce the bracket B B.` The foot B is adapted, as usual, for bolting upon any ixed object, as a beam or Hoor. The lpart B encircles the spherical part Al of the box, and its interior corresponds in form to the prepared box.

This

hanger-pattern is soV made as to cause the spherical part A of the box A A C to be encircled by metal in a continuous piece when the casting is completed by pouring in the melted iron.

The spherical part of the box need not be entirely inclosed within the outer casting B B', as it will suffice it' supported, as shown in strong lines in Fig. 2, or it may be continued quite around, as shown in dotted lines.

It may be desirable to coat the spherical part of the box with a clay wash, such as is used in foundries for coating cores with; or the support may be cast first, and the box then cast in it, the shrinkage of the box within the other casting, in the latter case, allowing the coating to be dispensed with. The` pin C prevents the box A from revolving; but the pin may vibrate in the groove to accommodate any permanent or temporary deection of the shaft.

I attach much importance to the facts: first, the hanger or bracket is cast in one piece of metal; second, it is adapted for bolting upon the floor; third, it encircles the box; and, fourth, it allows the pin to vibrate.

I am aware that hangers have been before constructed in parts bolted and fitted together; also, that boxes have been made with their central part spherical, and with the pin C and groove D to prevent turning; such therefore I do not claim.

What I claim is- The hanger or bracket B B', cast around and adapted to be used in combination with the box A A C, as and for the purposes specitied.

In testimony whereof I have hereunto set my hand this 30th day of March, 1875, in the presence of two subscribing witnesses.

THOMAS R. PICKERING.

Witnesses:

R. H. PAseALL, H. A. OORNWALL. 

